SN Requiem: A Supernova Seen Three Times So Far
We’ve seen this same supernova three times – when will we see it a fourth? When a distant star explodes in a supernova, we’re lucky if we see it even once.In the case of AT 2016jka (“SN Requiem”), because the exploding star happened to be lined up behind the center of a galaxy cluster (MACS J0138 in this case), a comparison of Hubble Space Telescope images demonstrate that we saw it three times.
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